It is a 2 in 1 LED light-up sword with bright color-changing LED and FX sounds. The Lightsaber is expandable, retractable, and can easily connect together to form a mega saber. The Light Sword has motion-sensitive color-changing LEDs. Whenever the swords meet; the LEDs turn yellow, red, blue, green, purple, and white. You have to swing to expand these light-up toy swords from 17” to 29.5” long. Classic Battle Mode: Swing to change color with FX sound and color changes during a sword fight. Pick-A-Side Mode: lock-in solid color selection with FX sound. Galactic Flash Mode: rapid color change with FX sound. Slow Fade Mode: color changes without music